On August 1, 2008, the USCIS published updated "how-to" or FAQs to help people with immigration and naturalization. These guides are available in a .pdf format for easy downloading and printing. Kudos, USCIS!
A- U.S. Citizens
A1- How Do I Help My Relative Become a U.S. Permanent Resident?
A2- How Do I Help My Fiancé(e) Become a U.S. Permanent Resident?
A3- How Do I Immigrate an Adopted or Prospective Adopted Child or Help My Adopted Child Become a U.S. Citizen or U.S. Permanent Resident?
A4- How Do I Get Proof of My U.S. Citizenship?
A5- How Do I Get Information About Requirements for Traveling Abroad?
B- Permanent Residents
B1- How Do I Help My Relative Become a U.S. Permanent Resident?
B2- How Do I Renew or Replace My Permanent Resident Card?
B3- How Do I Apply for U.S. Citizenship?
B4- How Do I Know What My Responsibilities Are?
B5- How Do I Get a Reentry Permit?
C1- How Do I Extend My Nonimmigrant Stay in the United States?
C2- How Do I Change to Another Nonimmigrant Status?
C3- How Do I Replace a Form I-94, Arrival-Departure Record?
D- Refugees and Asylees
D1- How Do I Help My Relative Get Refugee or Asylee Status in the United States?
D2- How Do I Show My Employer That I Am Authorized to Work in the United States?
D3- How Do I Become a U.S. Permanent Resident?
D4- How Do I Get a Refugee Travel Document?
E1- How Do I Hire a Foreign National for Short-Term Employment in the United States?
E2- How Do I Sponsor an Employee for U.S. Permanent Resident Status?
E3- How Do I Complete Form I-9, Employment Eligibility Verification?
E4- How Do I Use E-Verify?
F- General Information
F1- How Do I Know What Services Are Available After I File?
F2- How Do I Change My Address With USCIS?
F3- How Do I Financially Sponsor Someone Who Wants to Immigrate?